mandela frail. president obama leaning down to greet him. as a sitting president, he wrote the forward to nelson mandela's book. he considered it a great honor to be asked to write the forward to the book. you mentioned the joshua generation. president obama considered part of the joshua generation here in the united states. he was fired by the example of nelson mandela. even though they probably personally have great differences. >> yeah. no doubt. i think that the inspiration of an icon is extraordinary. obama taps into the spirit, the global recognition of this man's greatness. it's an irvisitable force. in terms of policy, ironically enough -- irresistible force. in terms of policy, ironically enough, he may have had more in common with george than president obama, who was chastised -- in reference to leadership and corruption, but a distancing operation that some critics in america have detected in his relationship to african-americans. so it's not just a local black thing, it's a global black thing. and there's been a tense relationshi